We looked at dozens of private rooms at restaurants in Chicago's downtown, River North, Gold Coast and Randolph Market District neighborhoods to identify the top spots for intimate business dinners. We winnowed a list of 90 great places down to 32 with an eye to balancing traditional and trendy, refined and rustic, blow-out and budget-conscious. Food and beverage minimums don't include tax or tip. All are wheelchair-accessible, unless noted. By Anne Moore and Anne Spiselman